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CCS/CC2652P: Questions about front-end RF design in SimpleLink SDK syscfg.

yingtao jia
Expert 1280 points
Part Number: CC2652P
Other Parts Discussed in Thread: CC1352P, SYSCONFIG

Tool/software: Code Composer Studio

Hi, my target uses CC2652P, SimpleLink cc13x2_cc26x2 SDKv4.20, my application is based on example CC1352P_2_LAUNCHXL ti54stack sensor_2_4g.

I have two questions about front-end RF design config in syscfg.

Question 1,

The front-end for 2.4GHz config has only differential RF mode and no single-ended mode as below

However, my target uses single-ended mode on RF_P and TX_20DBM_P. So how to choose single-ended mode please?

Question 2,

Also as the picture above, I can choose internal bias or external bias for 2.4G front end.

However, my target uses two different bias mode on two RF paths.

To be specific, internal bias mode on RF_P, external bias mode on TX_20DBM_P.

So, can I choose a bias mode for each of the two RF paths?

  • 0
    Prodigy 230 points

    I am also faced with this topic. Are there any news?

    Best regards,

    Martin

  • 0 in reply to Martin Reichelt
    Expert 1280 points

    Waiting for a reply.

  • 0 in reply to yingtao jia
    TI__Mastermind 21280 points

    Hi,

    Please see the CMD_PROP_RADIO_DIV_SETUP_PA radio command in SmartRF studio to configure the front end. See the .config field.

    Once radio is configured you can export the settings via code export.

    Regards,

  • 0 in reply to FI
    Expert 1280 points

    Does this mean if I want to use single-ended mode, I need to disable syscfg and use export code from SmartRF Studio?

  • 0 in reply to yingtao jia
    TI__Mastermind 21280 points

    HI,

    Just checked the 4.30.00.54 SDK and you can see the options is sysconfig there.

    You will not be able to see 20dBm in single ended mode though.

    Regards

  • 0 in reply to FI
    Expert 1280 points

    Thanks for your reply.

    I have tried example sensor_2_4g in SDK v4.30.00.54 as below:

    This example can be built successfully.

    Then, I change syscfg Font-end for 2.4GHz to single-ended mode RFP, build, however, error occured as below:

    And I don't really understand what this error mean.

    So, what should I do to make it build successfully?

    And another question, you said "You will not be able to see 20dBm in single ended mode though". Where can I "see" or can not "see" 20dBm, do you mean in syscfg->TI 15.4 Stack->Power->Transmit Power as below?

  • 0 in reply to yingtao jia
    Expert 1280 points

    Is there any progress on this problem please?

  • 0 in reply to yingtao jia
    TI__Mastermind 21280 points

    HI,

    I apologies for the delay. What I meant was that you will not measure 20dBm with single ended configuration.

    I have requested TI stack team to comment on the error you are observing.

    Regards

  • 0 in reply to yingtao jia
    TI__Guru**** 218397 points

    Hi yingtao,

    The only C:\ti\simplelink_cc13x2_26x2_sdk_4_30_00_54\source\ti\devices\radioconfig\.meta\config\<cc1352p_*>\cmd_settings option which appears to allow for the XS_RFP configuration appears to be the Proprietary Radio Stack, I will consult with the SysConfig Development Team to determine why this is the case.

    Regards,
    Ryan

  • 0 in reply to Ryan Brown1
    TI__Guru**** 218397 points

    Meanwhile, I can get the project to build by modifying C:\ti\simplelink_cc13x2_26x2_sdk_4_30_00_54\source\ti\devices\radioconfig\.meta\config\cc1352p_ieee_15_4_pg21\cmd_settings\frontend_settings.json as such:

    {
    "frontends": {
        "FrontEnd": [
            {
                "_name": "ID",
                "Command": {
                    "_name": "CMD_RADIO_SETUP_PA",
                    "Field": [
                        {
                            "_name": "config.frontEndMode",
                            "$": "0"
                        },
                        {
                            "_name": "config.biasMode",
                            "$": "0"
                        }
                    ],
                    "OverrideField": {
                        "_name": "pRegOverride"
                    }
                }
            },
            {
                "_name": "XD",
                "Command": {
                    "_name": "CMD_RADIO_SETUP_PA",
                    "Field": [
                        {
                            "_name": "config.frontEndMode",
                            "$": "0"
                        },
                        {
                            "_name": "config.biasMode",
                            "$": "1"
                        }
                    ],
                    "OverrideField": {
                        "_name": "pRegOverride"
                    }
                }
            },
            {
                "_name": "XS_RFP",
                "Command": {
                    "_name": "CMD_RADIO_SETUP_PA",
                    "Field": [
                        {
                            "_name": "config.frontEndMode",
                            "$": "1"
                        },
                        {
                            "_name": "config.biasMode",
                            "$": "1"
                        }
                    ],
                    "OverrideField": {
                        "_name": "pRegOverride"
                    }
                }
            }
        ]
    }
}

    This is not a verified solution but should get you moving forward for the time being.

    Regards,
    Ryan

  • 0 in reply to Ryan Brown1
    Expert 1280 points

    I'll try, thanks very much.